scope:

This Technical Specification defines the stage one description of the Earthquake and Tsunami Warning System (ETWS) Requirements. Stage one is the set of requirements seen primarily from the users" and service providers" points of view.

This TS includes information applicable to network operators, service providers, terminal and network manufacturers, in case of deployment of ETWS. ETWS deployment depends on operator decision or national regulations.

This TS contains the core requirements for the Earthquake and Tsunami Warning System, which are sufficient to provide a complete service.

This TS also contains regional requirements for Earthquake and Tsunami Warning System.